基于干燥动力学的烟草含水率快速检测方法  

A rapid detection method for moisture content in cured tobacco based on drying kinetics

作　　者：王乐[1] 毕思强 邓国栋[1] 梁淼 王兵[1] 郭亮 付丽丽 孟庆华[2] 李斌[1] WANG Le;BI Siqiang;DENG Guodong;LIANG Miao;WANG Bing;GUO Liang;FU Lili;MENG Qinghua;LI Bin(Zhengzhou Tobacco Research Institute of CNTC,Zhengzhou 450001,China;Qingzhou Cigarette Factory,China Tobacco Shandong Industrial Co.,Ltd.,Qingzhou 262500,Shandong,China;College of Food and Bioengineering,Zhengzhou University of Light Industry,Zhengzhou 450001,China)

机构地区：[1]中国烟草总公司郑州烟草研究院,郑州 [2]山东中烟工业有限责任公司青州卷烟厂,山东省青州市262500 [3]郑州轻工业大学食品与生物工程学院,郑州450001

出　　处：《烟草科技》2022年第10期88-95,共8页Tobacco Science & Technology

基　　金：国家烟草专卖局重点科技项目“制丝过程烟草堆积形态激光检测技术研究与应用”(110202102010);国家烟草专卖局重点科技项目“烟丝加工形态在线数字化检测与调控技术研究”(110202102009);山东中烟工业有限责任公司科技项目“不同类型卷烟燃吸过程吸阻变化规律的分析研究”(202101008)。

摘　　要：为提高烟草物料含水率测试效率,优化湿热处理单元工况调控响应,以Newton干燥动力学模型为基础,利用宏量热分析仪获取了10%~30%含水率区间内烟草物料的干燥速率与含水率之间线性相关规律,开发了一种烟草含水率的快速检测方法,并对该方法的准确度和重复性等进行了评价。结果表明:①5个标准样品检测结果的相对偏差小于2.89%,变异系数均小于3.71%,表明该方法准确度和重复性良好。②本方法试验参数为:干燥速率常数k=-0.004,干燥温度100℃,样品质量0.5 g,检测时间20 min。③该检测方法具有较好的普适性,对2019年福建南平4个等级、3个部位和5个含水率的样品检测绝对偏差均在0.46%以内。④该方法与烘箱法的相关系数R高达0.9956。⑤与4种常用含水率检测方法比较,快速含水率检测法具有精度较高、检测时间较短,控制精准及检测精度可进一步提高的特点。To improve the test efficiency of moisture content in tobacco materials and to optimize the working condition regulation response of heat-moisture treatment units,on the basis of a Newton drying kinetics model,the linear correlation between the drying rate and moisture content of tobacco materials within the moisture content range of 10%-30%was obtained by using a macro-calorimetry analyzer.A rapid detection method for the moisture content in tobacco was developed as a result,and its accuracy and repeatability were assessed.The results showed that:1)The relative error and coefficient of variation of detection of 5 standard samples were less than 2.89%and 3.71%respectively,which indicated that the method featured a high accuracy and good repeatability.2)The experimental parameters of the method were drying rate constant k-0.004,drying temperature at 100℃,sample mass around 0.5 g,and the detection time around 20 min.3)The method had a good universality.The absolute deviations of the test data for samples of 4 leaf grades,3 stalk positions and 5 moisture contents from Nanping,Fujian Province in 2019 were less than 0.46%.4)The correlation coefficient(R)between this method and the conventional oven method reached 0.9956.5)Comparing with 4 commonly used moisture content determination methods,the developed method has a high precision,short detection time and accurate control.

关 键 词：Newton干燥模型 烟丝含水率 恒速干燥 干燥动力学 

分 类 号：TS452[农业科学—烟草工业]